Steps to reproduce:
{}{}1. Create a new AR Mobile template project
2. Enter Play mode
3. Observe the Console and the Game window

Actual results: "No active UnityEngine.XR... is available" warnings are thrown and Game window is blank
Expected results: No errors or warnings are thrown and Game window is rendered

Reproducible with versions: 5.0.0-pre.8 (2021.3.47f1)
Not reproducible with versions: 5.1.5 (2022.3.54f1), 6.0.3 (6000.0.31f1, 6000.1.0a8)
Can't test with versions: 5.0.0-pre.9 (2021.3.47f1), 5.1.5 (2021.3.47f1) (Due to package errors)

Tested on (OS): macOS Sequoia 15.1 (Intel)

Notes:

• Full warnings:

{code:java}
No active UnityEngine.XR.ARSubsystems.XRSessionSubsystem is available. Please ensure that a valid loader configuration exists in the XR project settings.
UnityEngine.XR.ARFoundation.ARSession:OnEnable () (at Library/PackageCache/com.unity.xr.arfoundation@4.2.10/Runtime/AR/ARSession.cs:341){code}
{code:java}
No active UnityEngine.XR.ARSubsystems.XRCameraSubsystem is available. Please ensure that a valid loader configuration exists in the XR project settings.
UnityEngine.XR.ARFoundation.SubsystemLifecycleManager`3<UnityEngine.XR.ARSubsystems.XRCameraSubsystem, UnityEngine.XR.ARSubsystems.XRCameraSubsystemDescriptor, UnityEngine.XR.ARSubsystems.XRCameraSubsystem/Provider>:OnEnable () (at Library/PackageCache/com.unity.xr.arfoundation@4.2.10/Runtime/AR/SubsystemLifecycleManager.cs:68){code}
{code:java}
No active UnityEngine.XR.ARSubsystems.XRPlaneSubsystem is available. Please ensure that a valid loader configuration exists in the XR project settings.
UnityEngine.XR.ARFoundation.ARPlaneManager:OnEnable () (at Library/PackageCache/com.unity.xr.arfoundation@4.2.10/Runtime/AR/ARPlaneManager.cs:286){code}
{code:java}
No active UnityEngine.XR.ARSubsystems.XRRaycastSubsystem is available. Please ensure that a valid loader configuration exists in the XR project settings.
UnityEngine.XR.ARFoundation.ARTrackableManager`5<UnityEngine.XR.ARSubsystems.XRRaycastSubsystem, UnityEngine.XR.ARSubsystems.XRRaycastSubsystemDescriptor, UnityEngine.XR.ARSubsystems.XRRaycastSubsystem/Provider, UnityEngine.XR.ARSubsystems.XRRaycast, UnityEngine.XR.ARFoundation.ARRaycast>:OnEnable () (at Library/PackageCache/com.unity.xr.arfoundation@4.2.10/Runtime/AR/ARTrackableManager.cs:95){code}
{code:java}
No active UnityEngine.XR.ARSubsystems.XRAnchorSubsystem is available. Please ensure that a valid loader configuration exists in the XR project settings.
UnityEngine.XR.ARFoundation.ARTrackableManager`5<UnityEngine.XR.ARSubsystems.XRAnchorSubsystem, UnityEngine.XR.ARSubsystems.XRAnchorSubsystemDescriptor, UnityEngine.XR.ARSubsystems.XRAnchorSubsystem/Provider, UnityEngine.XR.ARSubsystems.XRAnchor, UnityEngine.XR.ARFoundation.ARAnchor>:OnEnable () (at Library/PackageCache/com.unity.xr.arfoundation@4.2.10/Runtime/AR/ARTrackableManager.cs:95){code}
{code:java}
No active UnityEngine.XR.XRInputSubsystem is available. Please ensure that a valid loader configuration exists in the XR project settings.
UnityEngine.XR.ARFoundation.ARInputManager:OnEnable () (at Library/PackageCache/com.unity.xr.arfoundation@4.2.10/Runtime/AR/ARInputManager.cs:24){code}